Landslides in Alameda County, California, A Digital Database Extracted from Preliminary Photointerpretation Maps of Surficial Deposits by T.H. Nilsen in USGS Open-File Report 75-277

Online link https://geo-nsdi.er.usgs.gov/metadata/open-file/99-504/metadata.faq.html
Description All or part of 25 7.5-minute quadrangles identifying 8465 Landslides largely slow-moving slides and earth flows in Alameda County, California, have been converted to a digital-map database, compiled at 1:24,000 scale and plotted at 1:62,500 scale, that ca
Originators Roberts, Sebastian; Roberts, Michelle A.; Brennan, Eileen M.; and Pike, Richard J.
Publication U.S. Geological Survey Open-File Report 99-0504

Related topics

States or counties

Overview of attributes

>25 USGS Quadrangles in the Coverage GRDPYS.SHP.PAT:
>Richmond
>Briones Valley
>Oakland East
>Las Trampas Ridge
>Diablo
>Tassajara
>Byron Hot Springs
>Clifton Court Forebay (formerly Bethany)
>San Leandro
>Hayward, Dublin
>Livermore
>Altamont
>Midway
>Newark
>Niles
>La Costa Valley
>Mendenhall Springs
>Cedar Mountain
>Lone Tree Creek
>Milpitas
>Calaveras Reservoir
>Mt. Day
>Eylar Mountain
>Mt. Boardman
>Oakland West
>Hunters Point
>Redwood Point
>Mountain View

For more information on coverages see the pamphlet included with the downloads.

AL-ARC.SHP.AAT

Type of contact or boundary

Label Definition
LTYPE Line type

AL-ARC.SHP.PAT

Landslide deposit

Label Definition
PTYPE Polygon type

GRDPYS.SHP.PAT

grid of quadrangle boundaries

Label Definition
NAME quadrangle names (see Entity_and_Attribute_Overview)

LC-SMLS.SHP

point features for small landslides for the La Costa Valley Quadrangle

Label Definition
PTYPE Point type
STRIKE Strike of landslide